Class COM.odi.coll.NotSingletonException

java.lang.Object
   |
   +----java.lang.Throwable
           |
           +----java.lang.Exception
                   |
                   +----java.lang.RuntimeException
                           |
                           +----COM.odi.ObjectStoreException
                                   |
                                   +----COM.odi.coll.CollectionException
                                           |
                                           +----COM.odi.coll.NotSingletonException

public class NotSingletonException
extends CollectionException

Thrown when Collection.only() is called on a collection with more than one element. You can invoke Collection.count() to determine how many time a specified object occurs in a collection.